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Energy Storage Technologies

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by

Eric Schulz

on 13 June 2013

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Transcript of Energy Storage Technologies

Energy Storage Technologies
A Presentation on the Problem
and the Evolution of storing Energy

Why do we need to store Energy?
History of
electrical energy Storages
Better Concepts
to store Energy
Summary of unsolved Problems
Energy efficiency
Storing is a basic domestic skill performed
by human societies and many animals
~50 BC first discovered galvanic cell
- 1745 von Kleist and van Musschenbroek invented first capacitor
- 1780 Galvanis "animal electricity"
- 1796 first battery by Volta
- 1800 - 1850 improvements of Voltas invention
- 1859 first rechargeable lead-acid battery
- 1903 NiCd, NiFe battery (e-mobiles)
- Enormous batteries for submarines(WWI)
- today still relatively low energy density
Flywheel:
1. Basic
Problem

2. Developement
of Solutions

3. Modern
Technologies

4. Unsolved
Problems

5. Future
Ideas

-> Preparation for periods of scarcity
-> Improvement of the utilization rate
-> Saving money
-> Other benefits
Increase mobility and flexibility of energy sources
Hot water bottle (thermal energy storage)
Cocked crossbow (potential energy storage)
Increase efficiency of energy utilization
Flywheel driven cars (kinetic energy storage)
1932 discovered vase
maybe produced voltage
when filled with acid
25 V
Forms of stored energy
Thermal, kinetic, potential energy
Chemical energy
Electrical energy
charged
discharged
Flywheel
Inertia
Angular Velocity
Good short time storage
Energy density: 0,022 MJ/kg
High self-discharging rate
new materials
&
technology
Energy density: 0,22 MJ/kg
self-discharging rate
10
Potter's wheels
Steam engines
Internal combustion engines
Grid energy storages
...
Batteries
Charging efficiency: 70%
Energydensity: 0.11 MJ/kg (low)
Banned in the EU
Contains Cadmium (toxic heavy metal)
Lower self-discharging rate (NiMH)
Usal rechargeable battery
Energy density: 0.3 MJ/kg
Realtively cheap in production
Also used in electric vehicles
Relatively high energy density: 0.8 MJ/kg
Low self discharging rate
Used in notebooks, mobile phones, ...
Tip: keep the charge at 60%,
to slow down the aging process
Relatively expensive in production
Electrolyte hold in Polymer instead of solvent
Lithium iron phosphate cathode
Electric vehicle (Example):
Weight of the energy storage in a car:
Lead-acid battery: 1350 kg
Lithium-ion battery: 311 kg
Gasoline tank: 35 kg
Need for a more effective energy storage!
Compressed
Air Storage
First storage: 1978 in Huntdorf, Germany
1991 in McIntosh, Alabama
since 2010 more projects in order to strore
energy that is produced regeneratively
Pumped
Storage
Potential energy storage
Highest storage capacity
Efficiency: 75%
Power-to-Gas
Hydrogen
solar panel
high energy density: 123 MJ/kg
H2 damages gas pipes
Storage problems:
low molar mass
-> extremely large storage
-> extremely high pressure
not effective
high selfdischarging rate (H2 diffuses)
Power-to-Gas
Synthetic Natural Gas
H2 from hydrolysis plus CO2 => Methan
no damage for gas pipes
higher molar mass
no diffusion
Problem: CO2 extraction very expansive
Friction
Mass
Speed
Batteries:
Costs
Energy density
Hydrogen:
Diffusion
Corrosion
SNG:
CO2 extraction
Changes in the Future
Energy demand
Storage technology
Fossil fuel
Smart grid
Home automation
Regenerative Energy
Sources:
http://www.express.co.uk/news/weird/331871/A-really-cheeky-chipmunk

http://en.wikipedia.org/wiki/Food_storage

http://de.wikipedia.org/wiki/Galvanische_Zelle

http://www.akkus-infoseite.de

http://de.wikipedia.org/wiki/Akkumulator

http://www.buch-der-synergie.de/c_neu_html/c_10_01_e_speichern_geschichte.htm

http://en.wikipedia.org/wiki/Capacitor

http://en.wikipedia.org/wiki/Voltaic_pile

http://en.wikipedia.org/wiki/History_of_the_battery

https://en.wikipedia.org/wiki/Energy_density

http://de.wikipedia.org/wiki/Schwungradspeicherung

http://www.bryentonenergyservices.com/blog/page/4
Full transcript